The diamond is the most important decision — and the largest portion of your budget. Here is how to make the right choice without overpaying.
The Priority Order: Cut > Carat > Color > Clarity
When you have a fixed budget, here is where to invest and where to save:
| Factor |
Recommendation |
Why |
| Cut |
Excellent or Ideal only |
Cut determines how much a diamond sparkles. A well-cut 0.80ct diamond outshines a poorly-cut 1.00ct every time. Never compromise on cut. |
| Carat |
Go slightly under milestones |
A 0.90ct diamond looks identical to 1.00ct but costs 15–20% less. Same for 1.40ct vs 1.50ct. The price jumps at round numbers. |
| Color |
G–H for white gold, I–J for yellow |
G and H diamonds look white to the naked eye. In yellow or rose gold, you can go lower because the warm metal masks any tint. |
| Clarity |
VS2–SI1 for most shapes |
Eye-clean in nearly all cases. Only step-cut shapes (emerald, Asscher) benefit from VS1 or higher because their open facets reveal inclusions. |
Choosing a Diamond Shape
Your setting determines which shapes are compatible, but if you are still deciding, here is how the most popular shapes compare in terms of cost and visual size:
| Shape |
Relative Cost |
Visual Size |
Best For |
| Round | Highest | Standard | Maximum brilliance, classic look |
| Oval | 15–25% less | Appears 10–15% larger | Elongated finger look, great value |
| Cushion | 20–30% less | Slightly larger | Vintage feel, soft sparkle |
| Emerald | 20–30% less | Larger table area | Art deco elegance (need VS1+ clarity) |
| Pear | 15–25% less | Appears larger | Unique silhouette, elongates finger |
| Princess | 15–20% less | Standard | Modern, geometric look |
| Marquise | 25–35% less | Appears largest per carat | Maximum face-up size, vintage feel |
| Radiant | 20–30% less | Slightly larger | Cushion brilliance with straight edges |
Budget tip: If you want the most visual impact for your money, choose an oval or marquise diamond. They face up significantly larger than a round of the same carat weight and cost considerably less. Read our
Diamond Shapes Guide for detailed comparisons.
GIA vs. IGI Certification
Both GIA and IGI are reputable grading laboratories. Here is how they compare:
| Lab |
Best For |
Notes |
| GIA |
Natural diamonds |
The gold standard for natural diamond grading. Strictest, most consistent grades. Universally recognized for resale. |
| IGI |
Lab-grown diamonds |
The most widely used lab for lab-grown grading. Reliable and consistent. Slightly less conservative than GIA on color and clarity for naturals. |
For more detail, see our Diamond Certification Guide.
Using the Diamond Search Filters
Our diamond search lets you filter by:
- Shape: Auto-filtered when coming from a setting, or select manually
- Carat weight: Set a minimum and maximum range
- Price: Set your diamond budget (separate from setting cost)
- Color: Filter by minimum color grade
- Clarity: Filter by minimum clarity grade
- Cut: Excellent, Very Good, or Good
- Lab: GIA, IGI, or both
- Type: Natural, lab-grown, or both